JP6418913B2 - Protector with sensor and end molding method for protector with sensor - Google Patents

Description

  The present invention relates to an opening and closing object that opens and closes an opening of a vehicle body, such as a sliding door that moves back and forth of a vehicle body such as a wagon car and a one-box car, a sunroof, and the like. The present invention relates to a protector with a sensor in which a sensor for detecting the presence of a foreign object is output by outputting a corresponding signal when a foreign object such as a finger is sandwiched therebetween, and an end molding method thereof.

  As shown in FIG. 9, a car that opens and closes the opening of the vehicle body by a sliding door 1 (or back door) such as a wagon car, or a car that opens and closes the opening of a vehicle body by a sunroof 2 as shown in FIG. The sensor-equipped protectors 10 and 20 are attached.

For example, a protector 10 with a sensor that protrudes toward the front side of the vehicle body and extends up and down as shown in FIG. 11 is attached to the front end surface of the slide door 1.
As shown in FIGS. 12 and 13, the sensor-equipped protector 10 is attached to the front end surface of the slide door 1, and includes a mounting base portion 11 having a substantially U-shaped cross section including a vehicle inner side wall 11 a, a vehicle outer side wall 11 b, and a connecting wall 11 c. A hollow portion 12 formed integrally therewith is provided. In the hollow portion 12, a part of a human body (finger or limb) is provided between the slide door 1 and a body side opening (in some cases, a front door (side door)). A sensor (pressure-sensitive sensor) S that detects the pinching and outputs a corresponding electric signal when a foreign object such as a pinch is pinched is attached (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).
In addition, in the lower part of the protector 10 with the sensor, a channel portion 13 having a C-shaped cross section is integrally formed on the side of the vehicle interior side wall 11a of the mounting base 11, and the wire harness W connected to the pressure sensor S is held. . A plurality of holding lips 14, 14 are provided inside the mounting base 11, and a core 15 having a substantially U-shaped cross section is embedded in the mounting base 11 in order to increase rigidity. Further, a decorative lip 16 is provided on the vehicle outer side wall 11 b of the mounting base 11.

  The sensor (pressure sensor) S is a conductive rubber-like elastic body (conductive portion) in which two core wires (electrode wires) 31 and 32 extending in the vehicle vertical direction (longitudinal direction) are provided via a space 33. ) It is fixed in the hollow portion 12 so as to be embedded in 34 and 35. When a foreign object is sandwiched between the slide door 1 and the body side opening when the slide door 1 is closed, the hollow portion 12 is The two core wires 31 and 32 are short-circuited by being partially pressed and crushed, and the rubber-like elastic bodies 34 and 35 are in contact with each other. Then, the change of the electric signal is transmitted to the control device 40 connected to the lead wires 36 and 36 connected to the two core wires 31 and 32 at the lower end portion of the protector 10 with the sensor, thereby the presence of foreign matter. Is detected. The lead wires 36 and 36 are bundled by the wire harness W in a state of being covered with an insulator, but the leading ends are bare wires that are exposed from the covering portions 37 and 37.

In the lower end portion of the protector 10 with the sensor, as shown in FIG. 14, the lead wire 36 is superimposed on the two core wires 31 and 32 drawn in the longitudinal direction (left direction in FIG. 8), and resistance welding is performed. As shown in FIG. 15, the wire is connected by soldering (FIG. 14 (b)) and the space 33 is exposed at the end so that it is closed by the insert 25 (FIG. 14 (c)). By molding, a part of the connection parts M, M, the insert 25 and the wire harness W is buried in the mold so as not to be exposed.
Also, in the upper terminal portion of the protector with sensor 10, as shown in FIG. 16, the legs 39a and 39a of the resistor 39 are overlapped with the two core wires 31 and 32 drawn in the longitudinal direction. In addition to being connected by soldering, the space portion 33 is closed by the insert 26, and then molding is performed so that the connection portion M, the insert 26, and the resistor 39 are buried inside the mold so as not to be exposed.
In FIGS. 15 and 16, the part of the mold forming is indicated by a dotted line.

Utility Model Registration No. 2585557 JP 2013-179007 A JP 2011-022038 A JP 2010-015696 A

The insertion of the space portion 33 with the inserts 25 and 26 prevents the molding material from flowing into the space portion 33 at the time of molding and prevents the sensor function from being impaired, or the two core wires 31 and 32 including the connection portion M are connected to each other. This is to prevent a short circuit due to contact within the molding, or to ensure sealing between the wiring inside the molding and the outside of the resistor 39.
At this time, since the insertion of the inserts 25 and 26 with respect to the space portion 33 is only inserted into the space portion 33, it is sufficiently stable even when the space portion 33 is inserted from the inside. It is not a state.

  Therefore, in the molding process, when the extrusion molding end portion with the inserts 25 and 26 being press-fitted is set in the mold, or when the molding material is allowed to flow in the set state, the insert 25 is inserted into the space portion 33. , 26 may not create the outer shape of the product according to the target size and shape.

In the invention described in Patent Document 1, the protruding portion of the electrode plate is press-fitted into the conductive rubber-like elastic member layer, but a liquid rubber member is injected and cured by curing at room temperature for 24 hours for sealing. It is not intended to form the outer shape of the end portion with a molding material.
Moreover, although the invention described in patent document 2 inserts an insertion part from the edge part of an extrusion molding part, an insertion part is not firmly fixed with respect to a hollow part.

Patent Document 3 describes that a resin material is used to form a terminal part in a hollow shape so as to cover the connection part, but two connections are made by inserting an insert into the terminal part. Since the parts are not separated from each other, it is necessary to form a part that partitions between the two connection parts with a resin material in order to avoid contact between the two connection parts.
In addition, since the invention of Patent Document 3 does not insert an insert into the terminal portion in the same manner, when molding is performed thereafter, the mold molding material flows into the sensor side to prevent the sensor function from being damaged. It is also necessary to bother the part or the weir part.

  Patent Document 4 discloses a resin mold part that covers an end cap by inserting and positioning an end cap into the sensor body at the end of the sensor, and then molding the resin so as to cover the end cap. Is molded. According to this method, the resin can be prevented from flowing into the sensor, but the end cap is merely inserted into the sensor body and is not bonded. In addition, since the resin only covers the end cap and the sensor end, the area where the resin and the sensor main body are in direct contact is small, and the resin that is easily molded with a small force peels off from the sensor main body, There was a risk of poor watertightness.

  Accordingly, an object of the present invention is to provide a protector with a sensor and an end molding method for the protector with a sensor that can reduce the variation in the shape of the product at the time of molding the terminal part mold and obtain a sufficient sealing function. .

In order to achieve the above object, the sensor-equipped protector according to the present invention includes a peripheral edge of an opening / closing object that opens and closes an opening of a vehicle body, such as an automobile door (1) and a sunroof (2), and the opening of the opening. An attachment base (11) attached to the periphery and two conductive parts (34, 35, 54, 55) integrated with the attachment base (11) and having the core wires (31, 32) embedded therein are space portions ( tubular hollow section provided via 33, 53) provided with a (12, 52), said mounting base (11) and the hollow portion (12, 52) is extruded which is extruded by a rubber-like elastic body part constitute, when the hollow portion by the sandwiched foreign matters between closing the opening and closing thereof and the opening of the opening and closing thereof (12, 52) is crushed by being pressed by a change of the electrical signal corresponding to the Detect the presence of the foreign matter The core wire (31, 32) drawn in the longitudinal direction at the end portion of the extrusion molding portion is connected to the lead wire (36, 39a) connected to the control device (40) or the electrical component (39). At the same time, with the end (61, 71) side of the insert (60, 70) formed of a non-conductive material inserted so as to close the space (33, 53), A sensor-equipped protector (10) that is molded,
The insert (60, 70) is sized so as to be pressed into the space (33, 53) without gap from the one end (61, 71) end to the other end (62, 72) side. A thin section (64) having such a size that gaps (T1, T2, T3, T4) are formed between the thick section (63, 73) of the cross section and the space (33, 53). , 74) are provided continuously in this order, and an elongated space (65, 75) communicating from the end of the extruded portion to the thick portion (63, 73) by insertion of the insert (60, 70) is provided. It is formed.

  Here, the “change in electrical signal” includes a change due to a short circuit between two core wires and a change in capacitance.

According to the present invention, the conductive portion (54, 55) includes a hollow lower conductive portion (55) and a hollow upper conductive portion (54). The hollow lower conductive portion (55) has a convex shape and the hollow upper conductive portion. The conductive portion (54) has a concave shape, and the space portion (53) has a substantially inverted “V” shape in cross section and substantially the same width in cross section, so that the “V” shape opening is on the mounting base (11) side. It is characterized by being arranged and arranged to face.

  Further, according to the present invention, the thin portion (64) of the insert (60) has a substantially inverted "V" shape in cross section, and the gaps (T1, T2) formed between the space portion (53) are: The cross-sectional shape is characterized by being formed between both end portions (53a, 53b) of the space portion (53) and both end portions (64a, 64b) of the thin portion (64).

  Further, according to the present invention, an undercut portion (66) is formed in the thin portion (64) of the insert (60), and both end portions (53a, 53b) of the space portion (53) and the thin portion. A flow path (67) communicating from the gaps (T1, T2) formed between both ends (64a, 64b) of (64) to the undercut part (66) is formed. To do.

  In the present invention, the mounting base (11), the hollow portion (12, 52), the conductive portion (34, 35, 54, 55) and the core wire (31, 32) are integrally formed. And

Moreover, the edge part shaping | molding method of the protector with a sensor of this invention is an edge part shaping | molding method of the protector with a sensor as described in any one of Claims 1 thru | or 5,
An insert mounting step in which one end (61, 71) side of the insert (60, 70) is press-fitted into the space (33, 53) from a terminal portion of the extrusion molding portion;
A terminal portion of the extrusion molding part into which one end (61, 71) side of the insert (60, 70) is press-fitted is set in a mold, and a mold is inserted from the terminal of the extrusion molding part into the elongated space (65, 75). Covering the connecting portion (M) of the core wire (31, 32) and the lead wire (36, 39a) and the other end (62, 72) side of the insert (60, 70) while flowing the molding material (R) A primary sealing step of applying a primary seal by injection molding,
The method further comprises a secondary sealing step of applying a secondary seal by injection molding so as to form an outer shape of the product so as to overlap the portion subjected to the primary seal.

  Note that symbols in parentheses indicate corresponding elements or corresponding matters described in the drawings and modes for carrying out the invention described later.

According to the present invention, the insert has a cross-sectional shape with a size such that a gap is formed between the thick portion of the cross-sectional shape that is press-fitted without a gap into the space portion of the hollow portion and the space portion. When the insert is inserted, when the insert is inserted, an elongated space that communicates from the end of the extrusion part to the thick part is formed, so the end part of the extrusion part where one end of the insert is press-fitted When the terminal of the extrusion molding unit is molded by setting in a mold, the molding material does not stay at the terminal of the extrusion molding unit but is poured into an elongated space formed from the terminal of the extrusion molding unit.
Thereby, the insert is not only press-fitted into the space portion of the hollow portion, but is also fixed to the space portion of the hollow portion by adhesion (fusion) of the molding material in the elongated space. Moreover, since the adhesive surface (fusion surface) of the molding material to the extrusion molding part is a wide area from the end of the extrusion molding part to the thick part that becomes the weir of the insert, the molding part molded with the molding material and The insert is firmly and stably fixed to the hollow space.

Accordingly, the connection surface between the primary seal layer and the extrusion molding portion exhibits high water tightness, and when the mold molding portion is used as a primary seal and the mold molding is repeated thereafter, the extrusion molding end portion in which the insert is press-fitted is provided. When setting the mold or flowing the molding material in the set state, the insert may be slurled with respect to the space, causing the target dimensions to be created, or the product's external shape not being able to be created according to the shape. Can be prevented. Further, even when the molding is not repeated, the molding part and the extrusion end part are fused in a wide area.
Therefore, the protector with a sensor which can obtain a sufficient sealing function can be obtained.

  Further, according to the present invention, by providing a concave hollow upper conductive part and a convex hollow lower conductive part in the hollow part, the cross-sectional shape of the space part between the two conductive parts is a cross-section with a substantially reverse “V” shape. Since the "V" -shaped opening with substantially the same width is directed to the mounting base side, the hollow portion is made of foreign matter compared to the space having a substantially rectangular cross section (substantially rectangular). The movable range that can be bent at the time of detection can be widened, and as a result, detection in a wide range is possible for each of the inside and outside of the vehicle.

  Further, according to the present invention, the thin portion of the insert has a substantially inverted “V” shape in cross section, and the gap formed between the space portion and the space portion is formed between the both end portions of the space portion and the thin portion. Since it is formed between the both ends, the insert is fixed in a stable state so as to be sandwiched from both sides by the molding material.

Further, according to the present invention, the undercut portion is formed in the thin portion of the insert, and the gap is formed between the both ends of the space portion and the both ends of the thin portion, and communicates from the undercut portion. Since the flow path to be formed is formed, the return portion that is locked to the undercut portion is formed by the molding material continuously poured from the elongated space to the undercut portion.
Thereby, the fixing of the insert to the space portion of the hollow portion becomes stronger.

Further, according to the present invention, since the mounting base, the hollow portion, the conductive portion, and the core wire are integrally formed, the protector with a sensor can be manufactured in a stable state and with a reduced working time.
Thus, in the protector with a sensor, the attachment base portion, the hollow portion, the conductive portion, and the core wire are not integrally formed.

  Further, according to the present invention, the connecting portion of the lead wire connected to the core wire and the control device or the electrical component exposed from the terminal portion of the extrusion molding portion of the protector with sensor is a double seal formed by the primary seal layer and the secondary seal layer. As a result, the degree of guarantee of sealing performance at the end portion is improved. In addition, since the primary seal layer and the secondary seal layer are formed by ordinary injection molding, the curing time is not required and the working time can be shortened as compared with the case where an adhesive is used. Can also be planned. Furthermore, since the molding material can be quantitatively injected at a constant pressure using a mold, manufacturing variations are unlikely to occur and a stable sealing function can be exhibited.

It is a perspective view which shows the mode at the time of mold shaping of the lower terminal part of the protector with a sensor which concerns on embodiment of this invention. The insert of the protector with a sensor shown in FIG. 1 is shown, (a) is a perspective view, (b) is a side view. 2 shows a cross section of the insert shown in FIG. 2, and (a), (b), and (c) are an enlarged sectional view taken along line CC, an enlarged DD line, and E, respectively, of FIG. FIG. It is a BB line expanded sectional view of Drawing 11 showing a protector with a sensor concerning an embodiment of the present invention. 1 shows main parts in which inserts are press-fitted into the space part of the hollow part, and (a), (b), and (c) are respectively an FF line enlarged cross-sectional view and a GG line enlarged view of FIG. It is sectional drawing and a HH line expanded sectional view. It is a perspective view which shows the mode at the time of mold shaping of the protector-equipped protector upper terminal part which concerns on embodiment of this invention. It is a perspective view which shows another insert of the insert of the protector with a sensor shown in FIG. The insert shown in FIG. 7 shows the main part press-fitted into the space part of the hollow part of the form shown in FIG. 13, respectively, (a), (b) are the JJ line of FIG. It is an expanded sectional view which shows the state in which the site | part of the KK line was press-fitted. It is a side view of the motor vehicle opened and closed by a sliding door. It is a perspective view of the motor vehicle provided with the sunroof. It is a side view which shows the protector with a sensor shown in FIG. It is an AA line expanded sectional view of Drawing 11 showing a protector with a sensor concerning a conventional example. It is the BB expanded sectional view of FIG. 11 which shows the protector with a sensor which concerns on a prior art example. It is a perspective view which shows the process before mold forming of the lower terminal part of a protector with a sensor which concerns on a prior art example in order. It is a perspective view which shows the structure outline | summary after the shaping | molding of the lower terminal part of the protector with a sensor which concerns on a prior art example. It is a perspective view which shows the structure outline | summary after the shaping | molding of the protector-equipped protector upper side terminal part which concerns on a prior art example.

A protector with a sensor according to an embodiment of the present invention will be described with reference to the drawings. Here, the front-rear direction indicates the vehicle front-rear direction, and the upper-lower direction is the vehicle vertical direction in the case of the vehicle. In the protector with sensor 10, the hollow portion 52 side is up and the mounting base 11 side is down.
The sensor-equipped protector 10 according to the embodiment of the present invention protrudes toward the front side of the vehicle body on the front end surface of the slide door 1 in an automobile in which the opening of the vehicle body is opened and closed by the slide door 1 as shown in FIG. When a foreign object such as a part of the human body (finger or limb) is caught between the sliding door 1 and the body side opening (which may be a front door (side door)) A sensor (pressure sensor) S for outputting a corresponding electrical signal is attached, and the portion shown in FIG. 11 has the same configuration as that shown in the conventional example, but it is BB in FIG. FIG. 4 showing a portion where the sensor (pressure sensor) S is attached as an enlarged line section is different from that shown in FIG. 13 in the conventional example in that the hollow portion 52, the space portion 53, and the two conductive portions 54, 55. Refusal With shapes different, those having a different shape of the insert 60 to be inserted into the space 53. The same parts as those in the conventional example are denoted by the same reference numerals.

  As shown in FIG. 4, the protector with sensor 10 has a substantially U-shaped cross section including an inner wall 11a, an outer wall 11b, and a connecting wall 11c that are directly attached to a flange (not shown) formed on the slide door 1. If there is a foreign object such as a finger between the mounting base 11 and the mounting base 11 formed between the front end surface of the sliding door 1 and the body side opening facing the front end surface when the sliding door 1 is closed, A tube-shaped hollow portion 52 that elastically contacts the foreign matter, and a sensor (pressure sensor) S that is incorporated in the hollow portion 52 and detects the foreign matter and outputs a corresponding electrical signal, the sensor (pressure sensor) S, Two core wires (electrode wires) 31, 32 extending in the vehicle vertical direction (longitudinal direction) are embedded in conductive rubber-like elastic bodies 54, 55 provided via a space 53. It becomes fixed to the hollow portion 52. The conductive rubber-like elastic bodies 54 and 55 are made of conductive rubber mainly composed of synthetic rubber such as EPDM, and the sensor S is integrally formed with the non-conductive hollow portion 52.

  And as shown in FIG. 1, in the lower terminal part of the protector 10 with a sensor, the space part 53 of the hollow part 52 opened in the lower terminal part extruded by the insert 60 is closed, and the sensor is attached. As shown in FIG. 6, in the upper terminal portion of the protector 10, the space portion 53 of the hollow portion 52 opened in the upper terminal portion that is also extruded by the insert 60 is closed.

  A plurality of holding lips 14, 14 are provided inside the mounting base 11, and a core 15 having a substantially U-shaped cross section is embedded in the mounting base 11 in order to increase rigidity. Further, a decorative lip 16 is provided on the vehicle outer side wall 11 b of the mounting base 11.

The hollow portion 52 is integrally formed with the connecting wall 11c of the mounting base portion 11, and the tip end side protrudes toward the front of the vehicle.
Both end portions (vehicle inner end portion) 52a and (vehicle outer end portion) 52b of the hollow portion 52 are connected to the mounting base portion 11 with a space therebetween.
In the present embodiment, in the cross-sectional shape, the distance between the vehicle inner end 52a and the vehicle outer end 52b of the hollow portion 52 is substantially the same as the width in the vehicle interior / exterior direction at the portion of the mounting base 11 to which they are connected. . That is, the vehicle inner side end portion 52a constituting the outer shell of the hollow portion 52 is connected to the corner portions of the vehicle inner side wall 11a and the connecting wall 11c of the mounting base 11, and the vehicle outer side also constituting the outer shell of the hollow portion 52. The end 52b is connected to the corner of the vehicle outer wall 11b of the mounting base 11 and the connecting wall 11c.

  The outer shell (hollow wall) of the hollow portion 52 has a substantially chevron-shaped cross section in which a curved top 52c is formed, and the cross sectional shape of the mounting base 11 combined with the connecting wall 11c is the inboard side 52d and the outboard side. It is shaped like a triangle with the inclined side 52e as isosceles sides. Although not particularly limited, here, the inboard side inclined side 52d and the outboard side inclined side 52e are shown extending from the connecting wall 11c of the mounting base 11 at an inclination angle of 60 (°).

  The conductive rubber-like elastic bodies 54 and 55 are formed from a hollow lower conductive portion 55 provided on the attachment base 11 side in the hollow portion 52 and a hollow upper conductive portion 54 provided on the distal end side in the hollow portion 52. The core wire 31 is embedded in the center of the hollow upper conductive portion 54, and the core wire 32 is embedded in the center of the hollow lower conductive portion 55. In general, the conductive rubber-like elastic bodies 54 and 55 are made of a solid material without bubbles inside.

  The shape of the hollow upper conductive portion 54 and the hollow lower conductive portion 55, and the cross-sectional shape of the space portion 53 provided between the two conductive portions 54 and 55 by the arrangement of the hollow upper conductive portion 54 and the hollow lower conductive portion 55 in the hollow portion 52. Here, the cross-sectional shape is a substantially inverted “V” shape and has substantially the same width, and the “V” -shaped opening is arranged and arranged to face the mounting base 11 side. Become. In addition, the vehicle inner end 53a and the vehicle outer end 53b of the space 53 are directly connected to the inner peripheral surface of the hollow portion 52 (the inner peripheral surface of the outer shell of the hollow portion 52), respectively. A part of the vehicle inner side end portion 53a and the vehicle outer side end portion 53b are arranged and arranged so as to be directly connected to the attachment base portion 11 respectively.

The cross-sectional shape of the hollow lower conductive portion 55 is substantially mountain-shaped and the bottom is in contact with the connecting wall 11c of the mounting base 11. The cross-sectional shape of the hollow upper conductive portion 54 is substantially crescent shaped and both ends are connecting walls of the mounting base 11. It is lowered from the tip of the hollow portion 52 so as to approach the 11c side.
Further, the position of the lower portion 54a of the hollow upper conductive portion 54 is set closer to the mounting base 11 side than the position of the top portion 55a of the hollow lower conductive portion 55 so that both the conductive portions 54 and 55 can easily come into contact with each other even with slight bending. Thus, the passing of the contacts is prevented. Further, the cross-sectional shapes of the hollow portion 52 and the two conductive portions 54 and 55 and the space portion 53 provided in the hollow portion 52 are substantially symmetrical with respect to the symmetry axis that divides in the left and right halves in the vehicle interior direction and the vehicle exterior direction. The core wires 31 and 32 are located on the axis.

  As shown in FIG. 13 shown in the conventional example and FIG. 8 to be described later, the cross-sectional shape of the space portion 53 can be formed in a substantially rectangular shape (substantially rectangular shape). The substantially inverted “V” shape (FIG. 4) allows a wider movable range in which the outer shell of the hollow portion 52 can bend when detecting foreign matter. There is an advantage that a wide range of detection is possible with respect to the outside.

  Further, the mounting base 11 and the hollow portion 52 of the protector with sensor 10 are formed by extruding a non-conductive rubber-like elastic body made of a synthetic rubber such as EPDM or a thermoplastic elastomer such as TPO or TPS, for example. In the configuration, the upper and lower end portions of the vehicle are molded and trimmed in outer shape. In addition, since the hollow part 52 of the protector 10 with a sensor needs a softness | flexibility, the foamed sponge material may be used. Similarly, the foamed sponge material may be used for the attachment base 11 as well.

  The insert 60 is flexible and non-conductive such as polypropylene, polyethylene, polyethylene terephthalate, nylon, 6 nylon, 6-6 nylon, various thermoplastic elastomers (TPE), and TPE of olefin and TPS of styrene among TPE. It is made of a material having a characteristic and is composed of an insertion portion 61 provided on one end side and a projecting portion 62 provided on the other end side.

  The cross-sectional shape of the insertion portion 61 is a substantially inverted “V” shape in the same manner as the space portion 53 of the hollow portion 52, and the cross-section as shown in FIG. When the thick portion 63 having a shape and the thin portion 64 as shown in FIGS. 3B and 3C are continuously provided in this order, the insert 60 is press-fitted into the space portion 53 of the hollow portion 52. An elongated space 65 communicating from the end of the extrusion molding portion to the thick portion 63 is formed.

  The thick portion 63 formed on one end side of the insert 60 is substantially the same as the space portion 53 so as to be press-fitted into the space portion 53 of the hollow portion 52 when the insert 60 is inserted, as shown in FIG. Alternatively, the space 53 is closed without gaps by a slightly larger cross-sectional shape, thereby preventing the molding material R from flowing into the space 53 during the subsequent molding and damaging the sensor function.

  Further, the cross-sectional shape of the thin portion 64 of the insert 60 is smaller than that of the thick portion 63. Here, as shown in FIG. 3C, both end portions 64a and 64b are made shorter than the thick portion 63 indicated by the dotted line. Thereby, when the insert 60 is inserted, as shown in FIG. 5C, in the cross-sectional shape, the gap T1, between the both end portions 53a, 53b of the space portion 53 and the both end portions 64a, 64b of the thin portion 64 is formed. Each of T2 is formed. The gaps T1 and T2 are a part of the elongated space 65 formed so as to communicate from the end of the extrusion molding portion to the thick portion 63, and the molding material R (filled in black in FIG. 5) is provided here. It is made to flow.

  As for the shape of the insert 60, the insertion portion 61 of the insert 60 is composed only of the thick portion 63 having the cross-sectional shape shown in FIG. 3A and the thin portion 64 having the cross-sectional shape shown in FIG. However, in this embodiment, as shown in FIG. 2B and FIG. 3B, the top portion of the insert 60 is shaved from the thin portion 64 to the thick portion 63 side. The undercut part 66 which inclines and descends is formed, and the cross-sectional shape of the thin part 64 is changed in two steps. Then, the overall cross-sectional shape of the thin portion 64 in which the undercut portion 66 is formed is made smaller than the cross-sectional shape of the thin portion 64 in which the undercut portion 66 is not formed as shown in FIG. 5 is formed between the gaps T1 and T2 formed between the both end portions 53a and 53b of the space portion 53 and the both end portions 64a and 64b of the thin portion 64, respectively. As shown in (b), the molding material R (filled in black in FIG. 5) flows continuously from the gaps T1 and T2 to the undercut portion 66.

  In order to allow the molding material R (painted in black in FIG. 5) to continuously flow from the gaps T1 and T2 to the undercut portion 66, a gap (flow path) is formed with respect to the lower surface of the hollow upper conductive portion 54. 67), the cross-sectional shape of the upper surface of the thin portion 64 may be reduced, but here, the cross-sectional shape of the lower surface of the thin portion 64 is also reduced so that it is between the upper surface of the hollow lower conductive portion 55. Also, a gap 68 into which the molding material R (filled in black in FIG. 5) flows was formed. As a result, in the thin portion 64 in which the undercut portion 66 is formed, a gap is formed between the space portion 53 of the hollow portion 52 over the entire periphery, and the molding material R (filled in black in FIG. 5) is formed on the entire periphery. )) Is flowing.

The projecting portion 62 of the insert 60 is positioned by colliding with the hollow upper conductive portion 54 and the hollow lower conductive portion 55 when the insert 60 is inserted into the protector 10 with a sensor, and has a substantially “H” cross section. In the lower terminal portion of the sensor-equipped protector 10, as shown in FIG. 1, the tip of the two core wires 31 and 32 drawn out from the hollow portion 52 in the longitudinal direction is exposed from the covering portion 37. The two lead wires 36, 36 made to be bare wires are overlapped and connected by resistance welding or soldering, and the two connection portions M, M are accommodated inside the protruding portion 62 but are exposed. (Visible from the outside).
The two lead wires 36 and 36 are bundled together by the wire harness W in a state of being covered with an insulator, and the outer peripheral surface is covered with an outer skin, but at the end of the wire harness W, the covering portions 37 and 37 are covered. Is pulled out, and lead wires 36 and 36 are further drawn out from the covering portions 37 and 37 so as to be exposed. The wire harness W is connected to the control device 40, and the presence of a foreign object is detected by the control device 40.

  The extruded lower end portion of the protector 10 with the sensor is closed at the insert portion 60 in the insert mounting process, and the end portion of the extruded portion into which the insert 60 is press-fitted in the primary sealing step. Is set in a mold (not shown), and the core material 31, 32 exposed from the terminal portion by injection molding and two lead wires while the molding material R flows into the elongated space 65 formed from the terminal of the extrusion molding portion. A primary seal layer 100 is applied to cover the connecting portions M, M of 36 and 36 and the protrusion 62 of the insert 60 from the outside. Next, in the secondary sealing step, the surface of the primary seal layer 100 is formed by injection molding. The outer shape of the product is formed by overlapping and covering with the secondary seal layer 200.

  Further, in the upper end portion of the protector with sensor 10, as shown in FIG. 6, the body portion of the resistor (electrical component) 39 is stably placed at the end of the protruding portion 62 of the insert 60, and is hollow. Two legs (lead wires) 39a and 39a of the resistor 39 are overlapped with the two core wires 31 and 32 drawn in the longitudinal direction from the portion 52, and are connected by resistance welding or soldering. Although the connection parts M and M of the location are stored inside the protrusion part 62, they are in an exposed state (a state seen from the outside).

  And the upper terminal part of the protector 10 with a sensor by which the extrusion molding was carried out WHEREIN: After insert | blocking the space part 53 with the insert 60 in an insert attachment process, in the primary sealing process, the terminal part of the extrusion molding part in which the insert 60 was press-fitted is used. The core wires 31 and 32 exposed from the end portion by injection molding and the legs 39a of the resistor 39 while being set in a mold (not shown) and flowing the molding material R into the elongated space 65 formed from the end of the extrusion portion. , 39a, the main body portion of the resistor 39, and the projecting portion 62 of the insert 60 are applied from the outside. Next, in the secondary sealing step, the primary sealing layer is formed by injection molding. The outer shape of the product is formed by covering the surface of 100 with the secondary seal layer 200.

Here, the material of the molding material R constituting the primary seal layer 100 is fused to the upper end portion and the lower end portion of the protector with sensor 10 during the injection molding of the primary seal layer 100, and is an olefin-based thermoplastic resin. Any resin composition may be used. Specifically, it is a thermoplastic resin containing polyethylene and / or polypropylene, and may be polyethylene or polypropylene. Moreover, these copolymers (ethylene-propylene copolymer) provided with rubber-like elasticity may be used, and the copolymer is also known as a reactor type, for example, Hifax (registered trademark). ), Adflex (registered trademark), Softell (registered trademark), P.M. E. R. (manufactured by Tokuyama Corporation), Vistamaxx (registered trademark), or the like can be used.
Furthermore, polymers of synthetic rubbers such as EPDM (ethylene-propylene-diene terpolymer) and EPM (ethylene-propylene copolymer) are also exemplified.
Moreover, even if it is TPS (olefinic thermoplastic elastomer) containing TPO (olefinic thermoplastic elastomer) and olefinic resin which are excellent in heat resistance and pressure resistance so that it does not melt at the time of injection molding of the secondary seal layer 200. Good.
Furthermore, what blended 2 or more types of the above-mentioned thermoplastic resin composition may be used.
In addition, if the colorless and transparent or colorless and translucent resin composition is used, the state of the connection part M and M can be confirmed visually. Further, it is desirable that it is flexible and has rubber elasticity.

  The molding material R constituting the secondary seal layer 200 is fused to the primary seal layer 100 during the injection molding of the secondary seal layer 200, and EPDM (ethylene-propylene-diene terpolymer), Examples thereof include rubber-like elastic bodies such as EPM (ethylene-propylene copolymer), TPO (olefin-based thermoplastic elastomer), TPS (styrene-based thermoplastic elastomer).

  In this embodiment, EPDM is used for the extrusion molding portion, and TPO is used as the material of the molding material R applied by the primary seal and the secondary seal.

According to such a sensor-equipped protector 10, the insert 60 has a gap between the space portion 53 and the thick portion 63 having a cross-sectional shape of a size that can be pressed into the space portion 53 of the hollow portion 52 without a gap. When the insert 60 is inserted, a narrow space 65 that communicates from the end of the extruded portion to the thick portion 63 is formed. Therefore, the molding material R stays at the end of the extrusion portion when the end portion of the extrusion portion where the one end 61 side of the insert 60 is press-fitted is set in a mold and the end portion of the extrusion portion is molded. Instead, it is poured into the elongated space 65 formed from the end of the extrusion molding portion.
Thus, the insert 60 is not only press-fitted into the space 53 of the hollow portion 52 but is also fixed to the space 53 of the hollow portion 52 by fusion (adhesion) of the molding material R in the elongated space 65. The Moreover, since the fusion-bonding surface (adhesion surface) of the molding material R is a wide area from the end of the extrusion-molded portion to the thick portion 63 serving as the weir of the insert 60, the insert 60 is in relation to the space portion 53 of the hollow portion 52. It is fixed in a strong and stable state.

Therefore, the connection surface between the primary seal layer 100 and the extrusion molding portion exhibits high water tightness, and in the case of secondary molding, when setting the extrusion molding end portion in which the insert 60 is pressed into the mold, or When the molding material R is allowed to flow in the set state, it is possible to prevent a problem that the target dimension is generated due to the insert 60 being displaced with respect to the space 53 or that the outer shape of the product cannot be produced according to the shape. . The primary seal mentioned above is intended to protect the above-described electrical parts, bare lead wires 36, and further, an object corresponding to an electrical circuit such as an end portion of an extrusion-molded portion from water immersion from the outside. These may be covered without any gaps. Therefore, the primary sealing process does not require molding of a large size, and therefore, resin is not injected with a strong pressure. Therefore, the insert 60 is merely press-fitted into the space 53 of the hollow portion 52, and there is no fear of slippage. On the other hand, the secondary seal here has a large and complicated shape such as the end of the product itself, and a synthetic rubber such as EPDM or a rubber-like elastic material such as TPO or TPS is used for the product function. Therefore, when this rubber-like elastic body is molded into a product shape, a large injection pressure is required. Therefore, if the primary seal according to the embodiment of the present invention is used, it is effective for preventing the deviation.
In addition, there is no risk that the injection pressure of the secondary seal will cause the displacement of the insert, and even if the primary seal is unnecessary, the end of the extrusion molding part and the molding part are fused in a wide area according to the embodiment of the present invention. Is done.
Therefore, the protector 10 with a sensor which can obtain a sufficient sealing function is obtained.

In the embodiment of the present invention, the cross-sectional shape of the insertion portion 61 of the insert 60 is substantially reverse “V” shape like the cross-sectional shape of the space portion 53 of the hollow portion 52 into which the insert 60 is inserted. The cross-sectional shape of the insertion portion 61 of the insert 60 is not particularly limited because various correspondences can be considered corresponding to the cross-sectional shape of the space portion 53 of the hollow portion 52.
For example, as in the conventional example (FIG. 13), when the cross-sectional shape of the space portion 13 of the hollow portion 12 is formed in a substantially rectangular shape (substantially rectangular shape), as shown in FIGS. The cross-sectional shape of the insertion portion 71 is also substantially rectangular (substantially rectangular).

At this time, the thick portion 73 formed on one end side of the insert 70 is press-fitted into the space portion 13 of the hollow portion 12 when the insert 70 is inserted, as shown in FIG. As a result, the space 13 is closed without gaps by the substantially same or slightly larger cross-sectional shape, thereby preventing the molding material R from flowing into the space 13 at the time of subsequent molding and impairing the sensor function.
Further, the cross-sectional shape of the thin portion 74 of the insert 70 is smaller than that of the thick portion 73. Here, compared to the thick portion 73, both end portions 74a and 74b are shortened. Thereby, when the insert 70 is inserted, as shown in FIG. 8B, in the cross-sectional shape, the gap T3 between the both end portions 13a, 13b of the space portion 13 and the both end portions 74a, 74b of the thin portion 74 is formed. Each of T4 is formed. The gaps T3 and T4 are a part of the elongated space 75 formed so as to communicate from the end of the extrusion molding portion to the thick portion 73, and the molding material R (filled in black in FIG. 8) is here. It is made to flow.

In the present embodiment, the mounting base 11, the hollow 52 and the sensor S are integrally formed. However, each of them is formed separately. For example, the mounting base 11 and the hollow 52 are fixed with an adhesive or an adhesive tape. The sensor S may be integrated by being inserted into the hollow portion 52. Moreover, the structure by which any two of the attachment base 11, the hollow part 52, and the sensor S are integrally molded, and the remaining one is shape | molded separately.
Further, in the present embodiment, the mounting base 11 is provided with a plurality of holding lips 14 and 14 inside thereof, and the core material 15 having a substantially U-shaped cross section is embedded therein. Even if there is one, the holding lip 14 may be one, and the core material 15 may not be embedded. Moreover, it is not limited to such a type, and if there is a portion for fixing the hollow portion 52 and the sensor S, it is set as the mounting base portion 11 and has a shape other than a substantially U-shaped cross section as in this embodiment. Is also included. Therefore, it may be not only gripped and fitted but also fixed by an adhesive tape, and various forms can be selected.

In the embodiment of the present invention, in the automobile in which the slide door 1 moves in the front-rear direction, the example in which the protector with sensor 10 is attached to the slide door 1 side is described as an example. 10 may be attached to detect foreign matter between the sliding door 1 and the sliding door 1.
Moreover, the protector 10 with a sensor can also be applied to a back door or the sunroof 2 (FIG. 10).

DESCRIPTION OF SYMBOLS 1 Slide door 2 Sunroof 10 Protector with sensor 11 Mounting base part 11a Car inner side wall 11b Car outer side wall 11c Connection wall 12 Hollow part 12a Car inner end part 12b Hollow part car outer end part 13 Channel part 14 Holding lip 15 Core material 16 Decorative lips 25, 26 Inserts 25a, 26a Insertion portions 25b, 26b Protruding portions 31, 32 Core wires 33 Space portions 33a Space portion vehicle inner end portions 33b Space portion vehicle outer end portions 34, 35 Rubber-like elastic bodies 36 Leads Wire 37 Covering part 39 Resistor 39a Resistor foot (lead wire)
40 Control part 52 Hollow part 52a Car interior end part 52b Hollow part car outer side end part 52c Top part 52d Car inner slope part 52e Car outer slope part 53 Space part 53a Car interior end part 53b Car in space part Outer end portion 54 Hollow upper conductive portion 54a Lower portion of hollow upper conductive portion 55 Hollow lower conductive portion 55a Top portion of hollow lower conductive portion 60 Insert 61 Insertion portion 62 Protruding portion 63 Thick portion 64 Thin portion 64a Inside of thin portion End portion 64b Car outer end portion of thin portion 65 Elongated space 66 Undercut portion 67 Flow path 68 Clearance 70 Insert 71 Insertion portion 72 Projection portion 73 Thick portion 74 Thin portion 74a End portion on the inner side of thin portion 74b Meat Outer end of narrow part 75 Elongated space M Connection part R Molding material S Sensor (pressure sensor)
T1, T2 gap T3, T4 gap W Wire harness

Claims (6)

A peripheral edge of an opening / closing object that opens and closes an opening of a vehicle body, such as an automobile door or sunroof, a mounting base attached to the peripheral edge of the opening, and a core wire embedded in the mounting base 2 The conductive base includes a tube-shaped hollow portion provided through a space portion, and the mounting base portion and the hollow portion constitute an extruded portion that is extruded with a rubber-like elastic body, and when the opening and closing object is closed When the hollow portion is pressed and crushed by foreign matter sandwiched between the opening and closing object and the opening, the presence of the foreign matter is detected by a change in the corresponding electrical signal, and at the end portion of the extrusion molding portion The core wire drawn in the longitudinal direction is connected to a lead wire connected to a control device or an electrical component, and one end side of an insert made of a non-conductive material is inserted so as to close the space portion In state, the terminal portion of the extruded section is a sensor with protector formed by molding,
A gap is formed between the space portion and a thick section having a cross-sectional shape that is press-fitted into the space portion without a gap from one end of the insert toward the other end. A thin portion having a cross-sectional shape of a size is continuously provided in this order, and an elongated space communicating from the end of the extruded portion to the thick portion is formed by inserting the insert. Protector with sensor. The conductive portion includes a hollow lower conductive portion and a hollow upper conductive portion, the hollow lower conductive portion is convex and the hollow upper conductive portion is concave, and the space portion is substantially inverted in cross section “V”. The protector with a sensor according to claim 1, wherein the “V” -shaped opening having a substantially equal width in cross section is arranged and arranged so as to face the mounting base side.   The thin portion of the insert has a substantially inverted “V” shape in cross section, and the gap formed between the space portion and the space portion has both end portions of the space portion and both end portions of the thin portion. The protector with a sensor according to claim 1 or 2, wherein the protector with a sensor is formed respectively.   An undercut portion is formed in the thin portion of the insert, and the flow path communicates from the gap formed between both ends of the space portion and both ends of the thin portion to the undercut portion. The protector with a sensor according to claim 3, wherein the protector is formed.   The protector with a sensor according to any one of claims 1 to 4, wherein the attachment base portion, the hollow portion, the conductive portion, and the core wire are integrally formed. It is an edge part shaping | molding method of the protector with a sensor as described in any one of Claims 1 thru | or 5,
An insert mounting step of press-fitting one end side of the insert into the space portion from a terminal portion of the extrusion molding portion;
The end portion of the extrusion molding portion into which one end side of the insert is press-fitted is set in a mold, and the connecting portion between the core wire and the lead wire is allowed to flow into the elongated space from the end of the extrusion molding portion. And a primary sealing step of applying a primary seal by injection molding so as to cover the other end side of the insert,
An end portion of a protector with a sensor, characterized by comprising a secondary sealing step of applying a secondary seal by injection molding so as to form an outer shape of the product so as to overlap the portion subjected to the primary seal. Molding method.